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Our Environment
Quiz 1
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Which of the following is biodegradable waste?
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DDT
0%
Aluminium can
0%
Plastic bag
0%
Cow dung
Explanation
Cow dung
Which of the two sets belong to the same trophic level?
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Rabbit: Tiger
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Vulture : Rat
0%
Grasshopper : Hawk
0%
Frog : Lizard
Explanation
Frog : Lizard
In a given food chain if the amount of energy at the fourth trophic level is 6 kJ, what will be the energy available at the producer level?
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6000 kJ
0%
20 kJ
0%
60 kJ
0%
600 kJ
Explanation
6000 kJ
Which of the following is the best way for disposal of vegetable and fruit peels?
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Landfill
0%
Recycling
0%
Composting
0%
Burning
Explanation
Composting
The problem caused due to ozone hole is
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earthquakes
0%
damage due to UV radiations
0%
chemical pollution
0%
acid rain
Explanation
damage due to UV radiations
An ecosystem includes
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all living organisms
0%
non-living objects
0%
both living organisms and non-living objects
0%
sometimes living organisms and sometimes non-living objects
Explanation
both living organisms and non-living objects
Accumulation of non-biodegradable pesticides in the food chain in increasing amount at each higher trophic level is known as
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eutrophication
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pollution
0%
biomagnification
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accumulation
Explanation
biomagnification
In an ecosystem, the 10% of energy available for transfer from one trophic level to the next is in the form of
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heat energy
0%
light energy
0%
chemical energy
0%
mechanical energy
Explanation
chemical energy
Organisms which synthesise carbohydrates from inorganic compounds using radiant energy are called
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decomposers
0%
producers
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herbivores
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carnivores
Explanation
producers
Excessive exposure of humans to UV-rays results in
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(i) and (ii)
0%
(ii) and (iv)
0%
(i) and (iii)
0%
(iii) and (iv)
Explanation
(i) and (iii)
Organisms of a higher trophic level which feed on several types of organisms belonging to a lower trophic level constitute the
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food web
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ecological pyramid
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ecosystem
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food chain
Explanation
food web
In the given Figure the various trophic levels are shown in a pyramid. At which trophic level is maximum energy available?
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T
4
0%
T
2
0%
T
1
0%
T
3
Explanation
T
1
Which group of organisms are not the constituents of a food chain?
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(i) and (iii)
0%
(iii) and (iv)
0%
(ii) and (iii)
0%
(i) and (iv)
Explanation
(ii) and (iii)
The percentage of solar radiation absorbed by all the green plants for the process of photosynthesis is about
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1%
0%
5%
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8%
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10%
Explanation
1%
Which of the statements is incorrect?
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All green plants and blue green algae are producers
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Green plants get their food from organic compounds
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Producers prepare their own food from inorganic compounds
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Plants convert solar energy into chemical energy
Explanation
Green plants get their food from organic compounds
The decomposers in an ecosystem
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convert inorganic material, to simpler forms
0%
convert organic material to inorganic forms
0%
convert inorganic materials into organic compounds
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do not breakdown organic compounds
Explanation
convert organic material to inorganic forms
Disposable plastic plates should not be used because
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they are made of materials with light weight
0%
they are made of toxic materials
0%
they are made of biodegradable materials
0%
they are made of non-biodegradable materials
Explanation
they are made of non-biodegradable materials
What will happen if deer is missing in the food chain given below?
Grass → Deer → Tiger
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The population of tiger increases
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The population of grass decreases
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Tiger will start eating grass
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The population of tiger decreases and the population of grass increases
Explanation
The population of tiger decreases and the population of grass increases
When is the world environment day celebrated?
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16 June
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5 December
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5 June
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5 July
Explanation
5 June
Which of these is a greenhouse gas?
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Hydrogen sulphide
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Methane
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Ozone
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Carbon monoxide
Explanation
Methane
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